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Security audit

Contentstack Content Management

Security checks for vulnerabilities and agentic risk

Overview

The Contentstack workflow has clear safeguards, but its setup can execute unverified remote code and introduce additional agent skills without explaining those changes.

Review and install a vetted CLI version yourself before use. Check its automatic agent-skill changes; the publisher documents OO_SKILLS_SYNC_DISABLED=1 to disable startup synchronization. Connect only the Contentstack access you need and review every write payload. The remote installers and hosted connector implementation were not verified.

Vulnerability Patterns
  • Skill Instruction HijackingAlters the agent's session goals or safety constraints when the skill loads
  • Agent Memory PoisoningWrites attacker-controlled rules into memory that affect later sessions
  • Remote Payload Retrieval and ExecutionFetches external code whose behavior can change after review
  • Embedded Malicious CodeShips malicious scripts inside the skill and executes them locally
  • Unauthorized Access and Privilege EscalationObtains permissions beyond the task's legitimate needs
Vulnerability Patterns
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
Findings (3)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
99% confidence
Finding

The supplied command installs software through a remotely fetched script; it does not perform any visible Contentstack content-management operation. No connection is established showing that this installation is a supporting implementation detail of the declared purpose. The downloaded script's additional behavior cannot be determined from this chunk.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

The setup command streams a mutable remote script directly into Bash without inspecting it or verifying a pinned version, signature, or trusted digest; the PowerShell alternative has the same weakness. If the distribution endpoint or release pipeline is compromised, installation can execute attacker-controlled code with the invoking user's permissions, potentially exposing local files and credentials; the missing-CLI prerequisite reduces exposure frequency but not execution impact.

Content

Scanner excerpt · SKILL.md (reported line 60)May include surrounding context.

Autonomous Decision Making

Medium
Category
Excessive Agency
Confidence
80% confidence
Finding

Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.

Content

Scanner excerpt · SKILL.md (reported line 81)May include surrounding context.

md
- **`OOMOL_INSUFFICIENT_CREDIT`** — OOMOL billing stop. Recharge at `https://console.oomol.com/billing/token-recharge` before retrying.

- **HTTP 402 without `OOMOL_INSUFFICIENT_CREDIT`** — the third-party account itself has no active plan or credit. Report the provider error message as is; do not ask the user to recharge OOMOL.

## Resources